Facilitated quantum cellular automata as simple models with non-thermal eigenstates and dynamics
Facilitated quantum cellular automata as simple models with non-thermal eigenstates and dynamics
复制标题
促进量子细胞自动机作为具有非热本征态和动力学的简单模型
DOI:
10.1088/2058-9565/aad759
复制
发表时间:
2018
影响因子:
6.7
通讯作者:
Zakirov, Bahti
中科院分区:
文献类型:
--
作者:
Gopalakrishnan, Sarang;Zakirov, Bahti
We introduce and describe a class of simple facilitated quantum spin models in which the dynamics is due to the repeated application of unitary gates. The gates are applied periodically in time, so their combined action constitutes a Floquet unitary. The dynamics of the models we discuss can be classically simulated, and their eigenstates classically constructed (despite being highly entangled). We consider a variety of models in one and two dimensions: we are primarily concerned with models involving Clifford gates, but we also briefly discuss a model involving Clifford and Toffoli gates. Two of these models are integrable free-particle models; we construct their conserved densities. For all five models, however, the eigenstate entanglement (in all cases) and operator dynamics (in all but one case) differ from those of generic chaotic systems. In addition, two of these models have exponentially many eigenstates in which one or more sites' disentangle'from the rest of the system, as a consequence of reflection symmetry.
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DOI:
--
发表时间:
1982
期刊:
影响因子:
--
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通讯作者:
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影响因子:
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